Pneumatic O-Ring Kits by Polypac — Reliable Custom Seals

Pneumatic O-Ring Kits — Precision Sealing from Polypac

Polypac offers industry-leading Pneumatic O-Ring Kits designed to deliver leak-free, long-lasting performance in pneumatic systems. Founded in 2008, our 10,000+ m² facility and advanced production and testing equipment ensure consistent quality for standard and bespoke sealing solutions.

Key Features of Our Pneumatic O-Ring Kits

Each kit combines carefully selected materials, dimensional accuracy, and controlled hardening to resist wear, extrusion and compression set. Polypac kits are optimized for ease of installation and durability, reducing downtime and maintenance costs for OEMs and service partners.

Material Options for Optimal Performance

We supply Pneumatic O-Ring Kits in NBR, FKM (Viton), silicone, EPDM and FFKM to match pressure, temperature, chemical and regulatory requirements. Our experience with filled PTFE and specialty compounds ensures compatibility with aggressive media and special operating conditions.

Customization and Rapid Prototyping

Polypac specializes in custom O-ring sizes, compound formulations and packaging. Collaborating with universities and research institutions, we fast-track prototypes and small-volume runs to validate seal geometry and compound behavior before scaling production.

Quality Assurance and Testing

Our on-site laboratories perform dimensional inspection, hardness testing, compression set, and aging tests to guarantee each Pneumatic O-Ring Kit meets performance specifications. Traceability and batch documentation support regulated industries and critical applications.

Applications and Industry Use

Polypac’s Pneumatic O-Ring Kits serve automation, robotics, valves, air treatment, and mobile equipment. Kits are engineered for low friction, tight sealing at varying pressures and resistance to lubricants and environmental exposure.

Why Choose Polypac

As one of China’s largest dedicated seal manufacturers, Polypac combines material science, manufacturing scale and customer support to deliver cost-effective, high-performance Pneumatic O-Ring Kits. Our long-term partnerships with research centers keep us at the forefront of seal innovation.

Ordering and Support

Contact Polypac for technical consultation, sample kits or custom quotations. We provide CAD support, material data sheets and on-time delivery options to simplify procurement and integration into your maintenance or production workflows.

Pneumatic O-Ring Kits Display

FAQ:
What does "AS568" mean?

AS568 is the Aerospace Standard that defines the dimensions for over 360 standard O-ring sizes. It is the most widely accepted sizing system in North America and globally. An AS568 number (e.g., AS568-214) specifies a precise inside diameter and cross-section.

How do I choose the right material for my sealing application?

Material selection depends on four key factors: Media: What fluid or gas will the seal contact? (e.g., petroleum oil, water, chemicals, steam) Temperature: What is the minimum and maximum operating temperature? Pressure: What is the system's operating pressure? Are there pressure spikes? Application: Is it a static, dynamic, or rotary seal? Example: NBR (Buna-N) is excellent for standard hydraulic oil, while FKM (Viton®) is needed for high temperatures or aggressive chemicals.

How important is surface finish on the metal parts that contact the seal?

Extremely important. A rough surface will abrade and wear out the seal quickly, causing leaks. A finish that is too smooth can prevent a lubricating film from forming. A typical recommended surface finish for dynamic applications is 0.2 to 0.8 μm (8-32 μin) Ra.

Why did my O-ring fail prematurely?

Common causes of O-ring failure include: Chemical Incompatibility: Swelling, softening, or cracking due to fluid exposure. Improper Sizing: Using an incorrect size leads to over-compression or inadequate sealing force. Abrasion: Wear and tear from rough surface finishes or contaminated fluid. Extrusion: The seal is forced into the gap between metal parts under high pressure. Installation Damage: Nicks, cuts, or twists during assembly.

What is the difference between NBR and FKM materials?

NBR (Nitrile/Buna-N): A general-purpose, cost-effective material with excellent resistance to petroleum-based oils and fuels. It has a standard temperature range of -30°C to +100°C (-22°F to +212°F). FKM (Fluoroelastomer/Viton®): A premium material with excellent resistance to high temperatures (up to 200°C+), chemicals, and oils. It is used in more severe environments but is more expensive than NBR.

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